From 2e7965e8b001826f6381877aa8a9ec60574b3ca3 Mon Sep 17 00:00:00 2001
From: Benjamin Peterson <benjamin@python.org>
Date: Sat, 26 Feb 2011 22:12:10 +0000
Subject: Merged revisions 88661 via svnmerge from
 svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

........
  r88661 | benjamin.peterson | 2011-02-26 16:06:24 -0600 (Sat, 26 Feb 2011) | 6 lines

  fix refactoring on formfeed characters #11250

  This is because text.splitlines() is not the same as
  list(StringIO.StringIO(text)).
........
---
 Lib/lib2to3/patcomp.py           |  3 ++-
 Lib/lib2to3/pgen2/driver.py      | 11 ++---------
 Lib/lib2to3/tests/test_parser.py | 10 ++++++++++
 3 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/Lib/lib2to3/patcomp.py b/Lib/lib2to3/patcomp.py
index bb538d5..0a259e9 100644
--- a/Lib/lib2to3/patcomp.py
+++ b/Lib/lib2to3/patcomp.py
@@ -11,6 +11,7 @@ The compiler compiles a pattern to a pytree.*Pattern instance.
 __author__ = "Guido van Rossum <guido@python.org>"
 
 # Python imports
+import io
 import os
 
 # Fairly local imports
@@ -32,7 +33,7 @@ class PatternSyntaxError(Exception):
 def tokenize_wrapper(input):
     """Tokenizes a string suppressing significant whitespace."""
     skip = set((token.NEWLINE, token.INDENT, token.DEDENT))
-    tokens = tokenize.generate_tokens(driver.generate_lines(input).__next__)
+    tokens = tokenize.generate_tokens(io.StringIO(input).readline)
     for quintuple in tokens:
         type, value, start, end, line_text = quintuple
         if type not in skip:
diff --git a/Lib/lib2to3/pgen2/driver.py b/Lib/lib2to3/pgen2/driver.py
index ee77a13..e7828ff 100644
--- a/Lib/lib2to3/pgen2/driver.py
+++ b/Lib/lib2to3/pgen2/driver.py
@@ -17,6 +17,7 @@ __all__ = ["Driver", "load_grammar"]
 
 # Python imports
 import codecs
+import io
 import os
 import logging
 import sys
@@ -101,18 +102,10 @@ class Driver(object):
 
     def parse_string(self, text, debug=False):
         """Parse a string and return the syntax tree."""
-        tokens = tokenize.generate_tokens(generate_lines(text).__next__)
+        tokens = tokenize.generate_tokens(io.StringIO(text).readline)
         return self.parse_tokens(tokens, debug)
 
 
-def generate_lines(text):
-    """Generator that behaves like readline without using StringIO."""
-    for line in text.splitlines(True):
-        yield line
-    while True:
-        yield ""
-
-
 def load_grammar(gt="Grammar.txt", gp=None,
                  save=True, force=False, logger=None):
     """Load the grammar (maybe from a pickle)."""
diff --git a/Lib/lib2to3/tests/test_parser.py b/Lib/lib2to3/tests/test_parser.py
index ce39e41..f389795 100644
--- a/Lib/lib2to3/tests/test_parser.py
+++ b/Lib/lib2to3/tests/test_parser.py
@@ -18,6 +18,16 @@ import os
 # Local imports
 from lib2to3.pgen2 import tokenize
 from ..pgen2.parse import ParseError
+from lib2to3.pygram import python_symbols as syms
+
+
+class TestDriver(support.TestCase):
+
+    def test_formfeed(self):
+        s = """print 1\n\x0Cprint 2\n"""
+        t = driver.parse_string(s)
+        self.assertEqual(t.children[0].children[0].type, syms.print_stmt)
+        self.assertEqual(t.children[1].children[0].type, syms.print_stmt)
 
 
 class GrammarTest(support.TestCase):
-- 
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